VEP/VER (VISUAL EVOKED POTENTIAL) LabTest

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Visual Evoked Potential/ Response (VEP/VER) measures the electrical signal generated at visual cortex in response to visual stimulation. The visual cortex is primarily activated by the central visual field and there is a large presentation of the macula at occipital cortex. VEP depends on integrity of visual pathway including eye, optic nerve, chiasma, optic tract, optic radiation and cerebral cortex. Standard International Society for Clinical Electrophysiology of Vision (ISCEV) protocols[1] assess the anterior visual pathway (eye, optic nerve anterior to the optic chiasma). For dysfunctions of posterior visual pathway extended multi-channel protocols are needed.


http://eyewiki.aao.org


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